Heat exchanger for water heater



FIG. 1 is a front view of a heat exchanger for water heater showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 1 with the internal parts omitted; and,

FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 4 with the internal parts omitted.

The broken lines shown in the drawings represent portions of the heat exchanger for water heater that form no part of the claimed design. 

CLAIM The ornamental design for a heat exchanger for water heater, as shown and described. 